They will never have enough production volume to warrant the investment that has solved so many problems in silicon.
Actually "never" is too strong of a word. I see a future where SWIR, LWIR, and MWIR "point and shoot" cameras are as easy to find (and as cheap to buy) as visible light "point and shoot" cameras are now. Ever heard just some random person (not a professional artist) say "that's a beautiful sunset"? So art is a huge part of even amateur photography. There are 2 types of art, beauty based, and surrealism based. And what better way to make art of that second type (surrealistic art) than to take a photo of your everyday surroundings, but using an exotic wavelength. SWIR, MWIR, and LWIR are all capable of this. And I think that the average person is more interested (at least to some degree) in artistic photos, than most of these companies realize.
This isn't something that major IR camera producers recognize at this point, unfortunately. If they did, they would be investing in a way to mass produce SWIR, MWIR, and LWIR cameras of the cheap "point and shoot" variety, and sell them at every Costco, Target, and BestBuy store in the country.
As with other consumer level cameras that are not intended for scientific use, there is a much larger level of acceptable defects in the image sensor. Fewer sensors being rejected based on defects, would mean more cameras being sold, so each camera could be cheaper. Because the final audience is going to be large, the devices will need to be mass produced. This will be what motivates them to finally invest heavily in finding more efficient ways of manufacturing sensors of this type on a large scale.
I can easily see a future 10 to 20 years from now, where it will be possible to get a point and shoot camera for SWIR at 4K resolution, MWIR at 1080p resolution, or an LWIR camera at 720p resolution; each at the price that a normal visible light point and shoot camera is now. And the version of the camera sold in the US will actually have 30FPS frame rate (overseas versions of the cameras will get 9FPS instead).